Two isomorphous transition metal complexes displaying a coordinated tetrathionate unit: bis(4,4′-dimethyl-2,2′-bipyridine-κ2N,N′)(tetrathionato-κ2S,S′)cadmium(II) dimethylformamide disolvate and the zinc(II) analogue
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Published:2013-06-25
Issue:7
Volume:69
Page:745-749
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ISSN:0108-2701
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Container-title:Acta Crystallographica Section C Crystal Structure Communications
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language:
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Short-container-title:Acta Crystallogr C
Author:
Harvey Miguel Angel,Suarez Sebastián,Doctorovich Fabio,Baggio Ricardo
Abstract
The isomorphous title compounds, [Tr(S4O6)(C12H12N2)2]·2C3H7NO (Tr = CdIIand ZnII), consist of metal centres to which one tetrathionate and two 4,4′-dimethyl-2,2′-bipyridine chelating ligands bind. The structures are completed by two symmetry-related dimethylformamide solvent molecules. Each metal-centred complex is bisected by a twofold axis running through the metal centre and halving the chelating tetrathionate dianion through the central S—S bond. The ancillary symmetry-related 4,4′-dimethyl-2,2′-bipyridine ligands act as chelates. This results in a distorted six-coordinate geometry, with similar Tr—O/N distances but central angles differing substantially from 90 and 180°. Both ligands are basically featureless from a geometric point of view, with torsion angles in both coordinated tetrathionate groups suggesting a trend linking metal size (covalent radius) and ligand `openness'. Packing is directed by (C—H)aromatic...O bridges and π–π offset stacked interactions defining chains along [001], further linked by weaker (C—H)methyl...O bridges, some of them mediated by the dimethylformamide solvent molecules.
Publisher
International Union of Crystallography (IUCr)
Subject
General Biochemistry, Genetics and Molecular Biology,General Medicine
Cited by
2 articles.
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